<markdown>

## chromium is‘t full screen

![异常进程列表](http://www.leconiot.com/md_res/jaysnote/chromium_not_fullscreen/images/process.png)

```bash
/usr/sbin/lightdm
\_ /usr/bin/X :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
\_ lightdm --session-child 13 16
    \_ /usr/bin/lxsession -s LXDE -e LXDE
        \_ /usr/bin/unclutter -idle 1 -root
        \_ /usr/bin/ssh-agent /usr/bin/dbus-launch --exit-with-session x-session-manager
        \_ openbox --config-file /home/pi/.config/openbox/lxde-rc.xml
        \_ lxpolkit
        \_ lxpanel --profile LXDE-pi
        \_ pcmanfm --desktop --profile LXDE-pi
        \_ xscreensaver -no-splash
        
\_ /usr/lib/chromium-browser/chrome-sandbox /usr/lib/chromium-browser/chromium-browser --type=zygote --user-data-dir=/tmp
|   \_ chromium-browser --type=zygote --user-data-dir=/tmp                          
|       \_ chromium-browser --type=zygote --user-data-dir=/tmp                          
 |           \_ /usr/lib/chromium-browser/chromium-browser --type=r                          
\_ chromium-browser --type=gpu-process --channel=30466.0.23259935 --user-data-dir=/tmp --supports-dual-gpus=false --gpu-driver-bu        
```


```bash
./cat_fb.sh &&sz fb0.bmp 
```


![白边](http://www.leconiot.com/md_res/jaysnote/chromium_not_fullscreen/images/exception.bmp)

尝试直接将 chromium  F11 全屏,无效。

```bash
$xdotool key F11
```

尝试设置chromium  窗口大小。

```bash
$xdotool search chromium-browser
$xdotool getwindowname 31457281
$xdotool windowsize  31457281 480 800
```

直接杀死chromium 窗口确定这里灰边为桌面背景。

```bash
$xdotool windowkill  29360131 
```

![桌面背景](http://www.leconiot.com/md_res/jaysnote/chromium_not_fullscreen/images/desktop.bmp)

直接启动chromium也确定未全屏。

```bash
$chromium-browser --start-maximized &
```

原来，chromium 有一个[kiosk-mode](https://www.sylvaindurand.org/launch-chromium-in-kiosk-mode/)专门用以全屏模式，尝试任然无效，所以推测很有可能是桌面环境设置的问题。

![](http://www.leconiot.com/md_res/jaysnote/chromium_not_fullscreen/images/chrome_not_fullcreen.bmp)


对比了正常和异常的桌面环境配置`~/.config`对比，找到了`/home/pi/.config/lxsession/LXDE/desktop.conf` 不一致，同时也验证了窗口管理器`openbox` 未启动。

```bash
window_manager=openbox-lxde
windows_manager/command=openbox
windows_manager/session=LXDE
```

![进程对比](http://www.leconiot.com/md_res/jaysnote/chromium_not_fullscreen/images/process_difference.png)


`~/.config/lxsession/LXDE/desktop.conf`  文件是来自于`/etc/xdg/lxsession/LXDE/desktop.conf` 拷贝。通过`~/.cache/lxsession/LXDE/run.log` 日志可以确定。

```bash
 Message: utils.vala:79: Config system location : /etc/xdg/lxsession/LXDE
 Message: utils.vala:85: System system path location : /etc/xdg/lxsession/LXDE/desktop.conf
 Message: utils.vala:89: Final file used : /etc/xdg/lxsession/LXDE/desktop.conf
 Message: settings.vala:527: Key file does not have key 'iGtk/ColorScheme'

 (lxsession:6879): WARNING **: settings.vala:889: Failed to create file '/etc/xdg/lxsession/LXDE/desktop.conf.LQE0UZ': Permission denied
```

</markdown>